Profile
Scientific name:	Zacco pachycephalus
Common name:	Stream brother, Ku cou zi, Wide-mouthed man (male fish), red cat

Features:	The Zacco pachycephalus has a long, flat body that grows on average to a length of 12-18cm, though they can sometimes grow as long as 20cm. They have large mouths with no barbels that protrude outward and extend horizontally to the area just below their eyes. Their backs are grayish-green, and their sides and bellies are silvery-white. Male fish also have ten narrow light-blue bands on their sides.
Behavior:	Zacco pachycephalus prefer to stay in the rear portions of deep lakes where the current flows quickly. They are very active fish most commonly seen in the early morning hours and in the evenings, when they will jump out of the water to catch flying insects. Their breeding season is between May and August, at which time males will develop breeding tuberdes on their heads, as well as red, green, and black colored nuptial bands on their sides. Zacco pachycephalus inhabit lakes, swamps, and the middle and lower reaches of rivers. Fingerlings are omnivorous, feeding primarily on algae, aquatic insects, and terrestrial insects, whereas adults are more carnivorous, feeding mainly on the small omnivorous fish found in streams.
Habitat:	Zacco pachycephalus appear in every catchment area in Taiwan except for those in Taitung and Hualien.